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Subland stepped drill bit, DIN 8374 RN medium, 90° - DRL-STEP-MF-DIN8374RNM-90DGR-HSS-D9,0MM Subland stepped drill bit, DIN 8374 RN medium, 90° - DRL-STEP-MF-DIN8374RNM-90DGR-HSS-D9,0MM
Subland stepped drill bit, DIN 8374 RN medium, 90° - DRL-STEP-MF-DIN8374RNM-90DGR-HSS-D9,0MM - 1
Subland stepped drill bit, DIN 8374 RN medium, 90° - DRL-STEP-MF-DIN8374RNM-90DGR-HSS-D9,0MM - 2

Subland stepped drill bit, DIN 8374 RN medium, 90°

Subland stepped drill bit HSS DIN8374 medium 90°
DRL-STEP-MF-DIN8374RNM-90DGR-HSS-D9,0MM

Art.-no. 5443810403
EAN 4062856088737
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Subland stepped drill bit, DIN 8374 RN medium, 90°

Art.-no. 5443810403

Prices for customers after login
Quantity
PU
x 1 pcs

Exclusively for trade customers

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With straight shank for the production of through holes according to ISO 273, while simultaneously producing countersinks (90°) in shape A and B according to DIN 74 part 1. The cutting speed depends on the large diameter, the feed on the small diameter.
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Product code

841M

Material to be processed

Steel, Cast metal, Copper, Brass, Aluminium, Plastic

Suitable for screw

M8

Standards

DIN 8374

Cutting material

HSS

Surface

Vaporised

Angle of the tip

118 Degree

Pilot hole diameter (d1)

9.0 mm

Spot-facer diameter (d2)

17.2 mm

Length (l1)

191 mm

Chip flute length (l2)

130 mm

Pilot hole length (l3)

19 mm

Countersink angle

90 Degree

Shank style

Cylindrical

Shank diameter

17.20 mm

Number of teeth

2 PCS

Coolant supply

External

Tolerance of cutting edge diameter

h8

Tolerance of shank diameter

h8

Type description

Quality grade medium

Material of sub-group

General structural steels, Non-alloyed tempering steels < 1000 N/mm², Alloyed tempering steels < 1000 N/mm², Grey cast iron, Malleable cast iron, Copper, Brass, Aluminium, Plastics

Cutting values for HSS drill bits
For dia. 5.5 to dia. 9
Material designation Tensile strength vc f
from to Dia. 5.5-7.9 Dia. 8-9
General structural steels < 500 N/mm² 30 50 0,120 0,200
500-850 N/mm² 25 35 0,120 0,200
Carbon steels < 850 N/mm² 25 35 0,120 0,200
850-1000 N/mm² 20 30 0,070 0,100
Unalloyed heat-treated steels < 700 N/mm² 25 35 0,070 0,100
700-850 N/mm² 20 30 0,070 0,100
850-1000 N/mm² 20 25 0,060 0,090
Alloyed heat-treated steels 850-1000 N/mm² 15 20 0,050 0,080
1000-1200 N/mm² 8 12 0,050 0,080
Unalloyed case-hardening steels < 750 N/mm² 25 35 0,070 0,100
Alloyed case-hardening steels < 1000 N/mm² 15 20 0,050 0,080
1000-1200 N/mm² 8 12 0,050 0,080
Nitriding steels < 1000 N/mm² 10 15 0,050 0,080
1000-1200 N/mm² 8 12 0,050 0,080
Tool steels < 850 N/mm² 10 15 0,050 0,080
850-1100 N/mm² 8 12 0,050 0,080
Cast iron < 180 HB 20 30 0,120 0,200
> 180 HB 20 30 0,100 0,160
Nodular graphite, malleable iron > 180 HB 25 35 0,120 0,200
> 260 HB 18 22 0,100 0,160
Aluminium, aluminium alloys < 530 N/mm² 40 100 0,140 0,180
Aluminium, cast aluminium alloys < 10 % Si < 600 N/mm² 30 60 0,140 0,180
Magnesium, magnesium alloys < 280 N/mm² 40 100 0,140 0,180
Copper, low-alloy < 350 N/mm² 35 65 0,140 0,180
Brass, short-chipping < 600 N/mm² 60 100 0,180 0,250
Brass, long-chipping < 600 N/mm² 35 60 0,150 0,400
Bronze, short-chipping < 600 N/mm² 25 50 0,080 0,140
650-850 N/mm² 25 50 0,080 0,140
Bronze, long-chipping < 850 N/mm² 15 35 0,080 0,140
850-1200 N/mm² 15 35 0,080 0,140
Legend
vc = cutting speed [m/min]
f = feed [mm/r]
The suggested cutting values are reference values and must be adapted to the respective conditions.

Art.-no.
Cust. Mat. No.

Hazardous Material

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